Drill-extension device.



H. J. PORSTER. DRILL EXTENSION DEVICE. APPLICATION IILED SEPT. a, 1913.

Patented July 21, 1914.

Zx Z q A W if I 1 7 11 P: J

fimmiy m E H 1 1 I a M w 1 r m: w f. A. 3 ,2 A11 1 1 WW F W j J 1 m Toall whom 'Ztmay concern:

;of Illinois, have a device which may which a ratchet drill,

.ject of this invention is Fig.

DRILL-EXTENSION DEVICE.

Be it known that I, HARRY J Fons'rER,

a citizen of the United States, and a resident in the county of Cook andState invented certain new and useful Improvements in Drill-Extension Devices, of which the following is a specification.

This invention relates to be used with drill extension telescoping tubesnow known and used in the art in boilers and other like places, fordrilling holes to which access by other means, is difficult. i v

' One object of this invention is to obtain be readily attached to anddetached from one of said tubes.

' A further object is to obtain a device to or a part thereof, may

of Chicago,

to adevice designed be applied.

A further object is. to obtain a device which, when attached to a drill,extension tube, may be used to hold an end piece, a drill, or othercylindrical device or tool.

A further object is'to obtain a device which can be used for thepurposes above will be durable, not liable break, and the applinamed andwhich to get out of order, or cation and working whereof will be readilyunderstood by drill operators. p

In drilling holes underneath boilers and other devices, it is at timesconvenient to have the drill ratchetinterposed. between the extensiontubes and the drill, and at other times it is convenient to have theextension tubes interposed between the drill ratchet and the drill, andtheprimary 'obto obtain a device which is adapted to' permit either ofsaid arrangements of the drill andrextension tubes. v

In the drawing accompanying and forming a part of this specificationFigure l-is a vertical section of the shell of the device, viewed asindicated by line 1, Fig. 2. Fig. 2 is an elevation of a modification ofthe construction illustrated in Fig. 1, at an angle of ninety degreesfrom said Fig. 1. 3 is a top plan view of the upper end of the shellwhich is illustrated inFig. 2,

showing saidmodification. Fig. dis an elevation of the upper 'end of theshell which is illustrated in Figs. 2 and 3, viewedat an And Fig. 5 is avertical endof the shell illustrated inFig. 1,

ing wherever .Bolt hole C is screw threaded at C v is substituted. for

angle of. ninety degrees from said Fig. 2. section of the lower showinga modification of said lower end. i

A reference .character nate a given part indicates said 'part throughoutthe several figures of the drawthesame appears.-

TED STATES PATENT onnicn.

' HARRY J. FORSTER, OF CHICAGO, ILLINOIS. I v

applied to desig- I A is a cylindrical. shell, provided with passage wayof more than one diameter therethrough. Parts" o of said passage way areof the same diameter, being substantially the same diameter as theoutside diameter ratchet; part a is of less diameter than part a; andpart a is of substantially the same diameter as the larger one of theseveral telescope tubes which form the ratchetextension used with thisdevice. The diameter of .parta is substantially the same as'the diameterof the feed screw of a drill ratchet.

B is a slot in the upper end of shell A, and O is a bolt hole at rightangles toslot B. Dotted 1), indicate be inserted in corresponding (orbroken) lines D, (Fig. the head of a belt which. can hole C, to extendthrough holesin the tube, or tubes, on which said shell is to besecured. The shell is clamped to said tube, or tubes, by turning saidbolt (D), so that-thescrew threads thereon engage with the screw threads0 prevent tubes X and Z from turning, and 2, to clamp shell A closely.to said tubes. holes referred to in tubes X,

Z, are lettered Z, in Fig.1.

The drill rods, as they are termed iii-the art, to which this device isattachable, often consist of telescoping tubes, so that said drill rodsmay-be lengthened, when required.

of the feed sleeve of a' drill (X, Z, Fig. 1),

The 7 Bolt D has two functions, 1, to p In Fig. 1, X and Z illustrateone end of a I drillrod made of telescoping tubes, and said 1 tubes areshown as telescoped.

In the modification of above described construction of shell A,(illustrated in Figs. 3' and a thehole C is not provided with screwthreads .at either end, and a pin, D bolt D; lugs or ears Eareprovided-on the shell A, and bolt D is inserted in holes in said ears.The hole in one of said ears is screw threaded (see 0?}, Fig.

7 pin D l) with threads corresponding with those on said bolt D and pinor bolt D is the same as the function of bolt D; that is, D preventsturning or longitudinalmovement of a tube having its end inserted in theshell, D clamps said shell closely to said tube. In

this construction the pin D is provided with a groove F, in which groovepin or bolt f is yieldingly held by the spring G. g 'is an abutment onthe hole therethrough inwhich'the pin or bolt f is longitudinallymovable.

is provided with the head f which is retracted when it is desired todraw pin D "out. In this'modification the pin D is inserted before theboltD is tightened to clamp the shell A to the tube or other devicewhichis inserted therein. Bolt D and pin D respectively, are-used to that therotation of thetube in the shell A and of said shell will be in unison,that is, without slipping.

By detaching theupper end of shell A from the remainder thereof I findsaid upper'end, in either of the constructions shown, may be used tosecure telescoping tubes firmly together, provided, of course, both saidtubes have holes whichare in alinement so that the bolt "D or pin D maybe inserted therethrough. (heated in Fig. '1 by lines X and Z, while asingle tube is illustrated in Fig. 2 by full and broken lines The lowerend of shell is provided with the abutments or cars I-I, one of whichis"other of which 7 slot.

provided with a screw threaded hole and the other with a hole,

make it certain the bolt (See j, Fig. 1.) 1

7' are handles which'extend through bolts said bolts are turned tocylindrical device on placed.

In Fig. 5 W is a screw threaded shaft corresponding with the ordinaryscrew threaded shaft of a ratchet drill andK a sleeve in screw threadedconnection with said shaft W. II is a pin to rigidly secure shaft 'I/V'to the shell A, to turntherewith. L is the; end of the ratchet drillwhich is obtained by shaft V? and sleeve K, in combination with ratchetwheel M and handle N. A screw threaded sleeve corresponding with sleeveK1 "is in ordinary use in drillratchets, and the ordinary fe' clampshell A to the which "said shell is ed sleeve of said ratchets issecured to the screw threaded feed shaft "thereof by a pin insubstantially the same; manner in which pin 7V securesshaft WI "to shellA.-

The combined function of.

shell A provided with a:

Pin or bolt f' by means of Two of said tubes are in-;

on one side of slot I and the is on the other side of said One of theabutments or ears H is through which holes the.

bolt J is extended with the screw threads on and in said hole inengagement} and J, respectively, by means of which,

'VV (Fig. 1), are lines which indicate a button inserted in passage waya to close said passage way, and to form an abutment against which thecenter bearing of a ratchet drill will be forced in the operation of thedevice; Where the end of tube X is closed the button W is not requiredas said center bearing abuts against said closed end of tube X. t

It will be observed that the annular rib forming the cylindrical wall ofpart a of the passage way through shell A, presents on the faces-thereofabutments, or annular tables against which the ends of the tubes X andZ, and the flange on button W abut, and by means of which the furthermovement of said parts in said passage way is prevented.

I claim p 1. A shell provided with a cylindrical passageway of more thanone diameter extending longitudinallytherethrough the part of saidpassage way which is of Smallest diam- "eter obtained by means of anannular rib with tables on the faces thereof adapted to form abutments,and said shell also provided with longitudinally extending slots open atthe ends of said shell, lugsontsaidshell, adjacentto said slots, saidshell and lugs provided with laterally extending holes and laterallyextending screw threaded holes, in combination with screw threaded boltsto fit said holes and the screw threads thereon to engage with thethreads in the screw threaded holes, said holes and bolts thereinarranged to contract the slotted portion of said shell on to acylindrical article contained therein at 'each'end thereof. 2. A shellprovided with a cylindrical passage way of more than one diameterextending longitudinally theiethrough the part of said passage way whichis of smallest diameter being obtained by means of an annular rib withtables on the faces thereof adapted to form abutments, and said shellalso provided with longitudinally extending slots open at the ends ofsaid shell, adjacent to said slots, said lugs respectively provided withlaterally extending holes, in combination with a bolt provided with anannular groove, said bolt adapted to extend through saidlaterallyextend'ing holes, means to contract the slotted portions ofsaid shell on to the bodies contained in said cylindrical passage way,an abutment on said shell, a longitudinally movable pin in saidabutment, and means to yieldingly hold said pin in an advanced positionto engage with said groove in the bolt which is in' the laterallyextending holes and adjacent to said pin. I

3. A device comprising a shell provided with means to contract saidshell on to bed ies "contained therein,-and provided with lugs on saidshell, said shell and l holes extending through the wall of said meansto yieldingly hold said last named shell, the combination of a pin orbolt adaptbody 1n an advanced position with the end ed to extend throughsaid holes in said Wall, thereof in said annular groove and said pin orbolt provided with an an HARRY J. FORSTER. 5 nular groove adjacent toone end thereof, In the presence ofv with an abutment on said shell, alongitu- CHARLES TURNER BROWN, dinally movable body in said abutment,and CHARLES B. HEBRoN.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 0."

